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1 | # This shell scriplet is meant to be included by other shell scripts | |
2 | # to set up some variables pointing at the normal git directories and | |
3 | # a few helper shell functions. | |
4 | ||
5 | # Having this variable in your environment would break scripts because | |
6 | # you would cause "cd" to be taken to unexpected places. If you | |
7 | # like CDPATH, define it for your interactive shell sessions without | |
8 | # exporting it. | |
9 | # But we protect ourselves from such a user mistake nevertheless. | |
10 | unset CDPATH | |
11 | ||
12 | # Similarly for IFS, but some shells (e.g. FreeBSD 7.2) are buggy and | |
13 | # do not equate an unset IFS with IFS with the default, so here is | |
14 | # an explicit SP HT LF. | |
15 | IFS=' | |
16 | ' | |
17 | ||
18 | git_broken_path_fix () { | |
19 | case ":$PATH:" in | |
20 | *:$1:*) : ok ;; | |
21 | *) | |
22 | PATH=$( | |
23 | SANE_TOOL_PATH="$1" | |
24 | IFS=: path= sep= | |
25 | set x $PATH | |
26 | shift | |
27 | for elem | |
28 | do | |
29 | case "$SANE_TOOL_PATH:$elem" in | |
30 | (?*:/bin | ?*:/usr/bin) | |
31 | path="$path$sep$SANE_TOOL_PATH" | |
32 | sep=: | |
33 | SANE_TOOL_PATH= | |
34 | esac | |
35 | path="$path$sep$elem" | |
36 | sep=: | |
37 | done | |
38 | echo "$path" | |
39 | ) | |
40 | ;; | |
41 | esac | |
42 | } | |
43 | ||
44 | # @@BROKEN_PATH_FIX@@ | |
45 | ||
46 | # Source git-sh-i18n for gettext support. | |
47 | . "$(git --exec-path)/git-sh-i18n" | |
48 | ||
49 | die () { | |
50 | die_with_status 1 "$@" | |
51 | } | |
52 | ||
53 | die_with_status () { | |
54 | status=$1 | |
55 | shift | |
56 | printf >&2 '%s\n' "$*" | |
57 | exit "$status" | |
58 | } | |
59 | ||
60 | GIT_QUIET= | |
61 | ||
62 | say () { | |
63 | if test -z "$GIT_QUIET" | |
64 | then | |
65 | printf '%s\n' "$*" | |
66 | fi | |
67 | } | |
68 | ||
69 | if test -n "$OPTIONS_SPEC"; then | |
70 | usage() { | |
71 | "$0" -h | |
72 | exit 1 | |
73 | } | |
74 | ||
75 | parseopt_extra= | |
76 | [ -n "$OPTIONS_KEEPDASHDASH" ] && | |
77 | parseopt_extra="--keep-dashdash" | |
78 | [ -n "$OPTIONS_STUCKLONG" ] && | |
79 | parseopt_extra="$parseopt_extra --stuck-long" | |
80 | ||
81 | eval "$( | |
82 | echo "$OPTIONS_SPEC" | | |
83 | git rev-parse --parseopt $parseopt_extra -- "$@" || | |
84 | echo exit $? | |
85 | )" | |
86 | else | |
87 | dashless=$(basename -- "$0" | sed -e 's/-/ /') | |
88 | usage() { | |
89 | die "$(eval_gettext "usage: \$dashless \$USAGE")" | |
90 | } | |
91 | ||
92 | if [ -z "$LONG_USAGE" ] | |
93 | then | |
94 | LONG_USAGE="$(eval_gettext "usage: \$dashless \$USAGE")" | |
95 | else | |
96 | LONG_USAGE="$(eval_gettext "usage: \$dashless \$USAGE | |
97 | ||
98 | $LONG_USAGE")" | |
99 | fi | |
100 | ||
101 | case "$1" in | |
102 | -h) | |
103 | echo "$LONG_USAGE" | |
104 | exit | |
105 | esac | |
106 | fi | |
107 | ||
108 | # Set the name of the end-user facing command in the reflog when the | |
109 | # script may update refs. When GIT_REFLOG_ACTION is already set, this | |
110 | # will not overwrite it, so that a scripted Porcelain (e.g. "git | |
111 | # rebase") can set it to its own name (e.g. "rebase") and then call | |
112 | # another scripted Porcelain (e.g. "git am") and a call to this | |
113 | # function in the latter will keep the name of the end-user facing | |
114 | # program (e.g. "rebase") in GIT_REFLOG_ACTION, ensuring whatever it | |
115 | # does will be record as actions done as part of the end-user facing | |
116 | # operation (e.g. "rebase"). | |
117 | # | |
118 | # NOTE NOTE NOTE: consequently, after assigning a specific message to | |
119 | # GIT_REFLOG_ACTION when calling a "git" command to record a custom | |
120 | # reflog message, do not leave that custom value in GIT_REFLOG_ACTION, | |
121 | # after you are done. Other callers of "git" commands that rely on | |
122 | # writing the default "program name" in reflog expect the variable to | |
123 | # contain the value set by this function. | |
124 | # | |
125 | # To use a custom reflog message, do either one of these three: | |
126 | # | |
127 | # (a) use a single-shot export form: | |
128 | # GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz" \ | |
129 | # git command-that-updates-a-ref | |
130 | # | |
131 | # (b) save the original away and restore: | |
132 | # SAVED_ACTION=$GIT_REFLOG_ACTION | |
133 | # GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz" | |
134 | # git command-that-updates-a-ref | |
135 | # GIT_REFLOG_ACITON=$SAVED_ACTION | |
136 | # | |
137 | # (c) assign the variable in a subshell: | |
138 | # ( | |
139 | # GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION: preparing frotz" | |
140 | # git command-that-updates-a-ref | |
141 | # ) | |
142 | set_reflog_action() { | |
143 | if [ -z "${GIT_REFLOG_ACTION:+set}" ] | |
144 | then | |
145 | GIT_REFLOG_ACTION="$*" | |
146 | export GIT_REFLOG_ACTION | |
147 | fi | |
148 | } | |
149 | ||
150 | git_editor() { | |
151 | if test -z "${GIT_EDITOR:+set}" | |
152 | then | |
153 | GIT_EDITOR="$(git var GIT_EDITOR)" || return $? | |
154 | fi | |
155 | ||
156 | eval "$GIT_EDITOR" '"$@"' | |
157 | } | |
158 | ||
159 | git_pager() { | |
160 | if test -t 1 | |
161 | then | |
162 | GIT_PAGER=$(git var GIT_PAGER) | |
163 | else | |
164 | GIT_PAGER=cat | |
165 | fi | |
166 | for vardef in @@PAGER_ENV@@ | |
167 | do | |
168 | var=${vardef%%=*} | |
169 | eval ": \"\${$vardef}\" && export $var" | |
170 | done | |
171 | ||
172 | eval "$GIT_PAGER" '"$@"' | |
173 | } | |
174 | ||
175 | sane_grep () { | |
176 | GREP_OPTIONS= LC_ALL=C grep @@SANE_TEXT_GREP@@ "$@" | |
177 | } | |
178 | ||
179 | sane_egrep () { | |
180 | GREP_OPTIONS= LC_ALL=C egrep @@SANE_TEXT_GREP@@ "$@" | |
181 | } | |
182 | ||
183 | is_bare_repository () { | |
184 | git rev-parse --is-bare-repository | |
185 | } | |
186 | ||
187 | cd_to_toplevel () { | |
188 | cdup=$(git rev-parse --show-toplevel) && | |
189 | cd "$cdup" || { | |
190 | gettextln "Cannot chdir to \$cdup, the toplevel of the working tree" >&2 | |
191 | exit 1 | |
192 | } | |
193 | } | |
194 | ||
195 | require_work_tree_exists () { | |
196 | if test "z$(git rev-parse --is-bare-repository)" != zfalse | |
197 | then | |
198 | program_name=$0 | |
199 | die "$(eval_gettext "fatal: \$program_name cannot be used without a working tree.")" | |
200 | fi | |
201 | } | |
202 | ||
203 | require_work_tree () { | |
204 | test "$(git rev-parse --is-inside-work-tree 2>/dev/null)" = true || { | |
205 | program_name=$0 | |
206 | die "$(eval_gettext "fatal: \$program_name cannot be used without a working tree.")" | |
207 | } | |
208 | } | |
209 | ||
210 | require_clean_work_tree () { | |
211 | git rev-parse --verify HEAD >/dev/null || exit 1 | |
212 | git update-index -q --ignore-submodules --refresh | |
213 | err=0 | |
214 | ||
215 | if ! git diff-files --quiet --ignore-submodules | |
216 | then | |
217 | action=$1 | |
218 | case "$action" in | |
219 | rebase) | |
220 | gettextln "Cannot rebase: You have unstaged changes." >&2 | |
221 | ;; | |
222 | "rewrite branches") | |
223 | gettextln "Cannot rewrite branches: You have unstaged changes." >&2 | |
224 | ;; | |
225 | "pull with rebase") | |
226 | gettextln "Cannot pull with rebase: You have unstaged changes." >&2 | |
227 | ;; | |
228 | *) | |
229 | eval_gettextln "Cannot \$action: You have unstaged changes." >&2 | |
230 | ;; | |
231 | esac | |
232 | err=1 | |
233 | fi | |
234 | ||
235 | if ! git diff-index --cached --quiet --ignore-submodules HEAD -- | |
236 | then | |
237 | if test $err = 0 | |
238 | then | |
239 | action=$1 | |
240 | case "$action" in | |
241 | rebase) | |
242 | gettextln "Cannot rebase: Your index contains uncommitted changes." >&2 | |
243 | ;; | |
244 | "pull with rebase") | |
245 | gettextln "Cannot pull with rebase: Your index contains uncommitted changes." >&2 | |
246 | ;; | |
247 | *) | |
248 | eval_gettextln "Cannot \$action: Your index contains uncommitted changes." >&2 | |
249 | ;; | |
250 | esac | |
251 | else | |
252 | gettextln "Additionally, your index contains uncommitted changes." >&2 | |
253 | fi | |
254 | err=1 | |
255 | fi | |
256 | ||
257 | if test $err = 1 | |
258 | then | |
259 | test -n "$2" && echo "$2" >&2 | |
260 | exit 1 | |
261 | fi | |
262 | } | |
263 | ||
264 | # Generate a sed script to parse identities from a commit. | |
265 | # | |
266 | # Reads the commit from stdin, which should be in raw format (e.g., from | |
267 | # cat-file or "--pretty=raw"). | |
268 | # | |
269 | # The first argument specifies the ident line to parse (e.g., "author"), and | |
270 | # the second specifies the environment variable to put it in (e.g., "AUTHOR" | |
271 | # for "GIT_AUTHOR_*"). Multiple pairs can be given to parse author and | |
272 | # committer. | |
273 | pick_ident_script () { | |
274 | while test $# -gt 0 | |
275 | do | |
276 | lid=$1; shift | |
277 | uid=$1; shift | |
278 | printf '%s' " | |
279 | /^$lid /{ | |
280 | s/'/'\\\\''/g | |
281 | h | |
282 | s/^$lid "'\([^<]*\) <[^>]*> .*$/\1/'" | |
283 | s/.*/GIT_${uid}_NAME='&'/p | |
284 | ||
285 | g | |
286 | s/^$lid "'[^<]* <\([^>]*\)> .*$/\1/'" | |
287 | s/.*/GIT_${uid}_EMAIL='&'/p | |
288 | ||
289 | g | |
290 | s/^$lid "'[^<]* <[^>]*> \(.*\)$/@\1/'" | |
291 | s/.*/GIT_${uid}_DATE='&'/p | |
292 | } | |
293 | " | |
294 | done | |
295 | echo '/^$/q' | |
296 | } | |
297 | ||
298 | # Create a pick-script as above and feed it to sed. Stdout is suitable for | |
299 | # feeding to eval. | |
300 | parse_ident_from_commit () { | |
301 | LANG=C LC_ALL=C sed -ne "$(pick_ident_script "$@")" | |
302 | } | |
303 | ||
304 | # Parse the author from a commit given as an argument. Stdout is suitable for | |
305 | # feeding to eval to set the usual GIT_* ident variables. | |
306 | get_author_ident_from_commit () { | |
307 | encoding=$(git config i18n.commitencoding || echo UTF-8) | |
308 | git show -s --pretty=raw --encoding="$encoding" "$1" -- | | |
309 | parse_ident_from_commit author AUTHOR | |
310 | } | |
311 | ||
312 | # Clear repo-local GIT_* environment variables. Useful when switching to | |
313 | # another repository (e.g. when entering a submodule). See also the env | |
314 | # list in git_connect() | |
315 | clear_local_git_env() { | |
316 | unset $(git rev-parse --local-env-vars) | |
317 | } | |
318 | ||
319 | # Generate a virtual base file for a two-file merge. Uses git apply to | |
320 | # remove lines from $1 that are not in $2, leaving only common lines. | |
321 | create_virtual_base() { | |
322 | sz0=$(wc -c <"$1") | |
323 | @@DIFF@@ -u -La/"$1" -Lb/"$1" "$1" "$2" | git apply --no-add | |
324 | sz1=$(wc -c <"$1") | |
325 | ||
326 | # If we do not have enough common material, it is not | |
327 | # worth trying two-file merge using common subsections. | |
328 | expr $sz0 \< $sz1 \* 2 >/dev/null || : >"$1" | |
329 | } | |
330 | ||
331 | ||
332 | # Platform specific tweaks to work around some commands | |
333 | case $(uname -s) in | |
334 | *MINGW*) | |
335 | # Windows has its own (incompatible) sort and find | |
336 | sort () { | |
337 | /usr/bin/sort "$@" | |
338 | } | |
339 | find () { | |
340 | /usr/bin/find "$@" | |
341 | } | |
342 | # git sees Windows-style pwd | |
343 | pwd () { | |
344 | builtin pwd -W | |
345 | } | |
346 | is_absolute_path () { | |
347 | case "$1" in | |
348 | [/\\]* | [A-Za-z]:*) | |
349 | return 0 ;; | |
350 | esac | |
351 | return 1 | |
352 | } | |
353 | ;; | |
354 | *) | |
355 | is_absolute_path () { | |
356 | case "$1" in | |
357 | /*) | |
358 | return 0 ;; | |
359 | esac | |
360 | return 1 | |
361 | } | |
362 | esac | |
363 | ||
364 | # Make sure we are in a valid repository of a vintage we understand, | |
365 | # if we require to be in a git repository. | |
366 | git_dir_init () { | |
367 | GIT_DIR=$(git rev-parse --git-dir) || exit | |
368 | if [ -z "$SUBDIRECTORY_OK" ] | |
369 | then | |
370 | test -z "$(git rev-parse --show-cdup)" || { | |
371 | exit=$? | |
372 | gettextln "You need to run this command from the toplevel of the working tree." >&2 | |
373 | exit $exit | |
374 | } | |
375 | fi | |
376 | test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || { | |
377 | gettextln "Unable to determine absolute path of git directory" >&2 | |
378 | exit 1 | |
379 | } | |
380 | : "${GIT_OBJECT_DIRECTORY="$(git rev-parse --git-path objects)"}" | |
381 | } | |
382 | ||
383 | if test -z "$NONGIT_OK" | |
384 | then | |
385 | git_dir_init | |
386 | fi | |
387 | ||
388 | peel_committish () { | |
389 | case "$1" in | |
390 | :/*) | |
391 | peeltmp=$(git rev-parse --verify "$1") && | |
392 | git rev-parse --verify "${peeltmp}^0" | |
393 | ;; | |
394 | *) | |
395 | git rev-parse --verify "${1}^0" | |
396 | ;; | |
397 | esac | |
398 | } |